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Mineralogy of Sulfides Elements

Mineralogy of Sulfides By David J. Vaughan and Claire L. Corkhill. ... (FeAsS) is the major natural source of arsenic, an extremely toxic pollutant. ... Disseminated to massive stratiform sulfide ores are often conformable within sedimentary sequences, grading into volcanic deposits of …

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A fresh approach to sulfide ores Canadian Institute of ...

The traditional route for extracting copper from sulfide ores is smelting. Yet there is a growing case for leaching sulfides from lower grade ore bodies and especially for those ore bodies containing problematic elements like arsenic, which make smelting less economical.

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Arsenic trisulfide Wikipedia

Arsenic(III) sulfide. Orpiment. Sulphuret of arsenic. ... Arsenic trisulfide is the inorganic compound with the formula As 2 S 3. It is a bright yellow solid that is insoluble in water. ... this conversion being one of the hazards associated with the refining of heavy metal ores: 2 As 2 S 3 + 9 O 2 → As 4 O 6 + 6 SO 2 Contemporary uses

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Chemistry of Arsenic Arsenic NCBI Bookshelf

In the natural environment, arsenic is rarely encountered as the free element. More frequently it is a component of sulfidic ores, in which it occurs as metal arsenides, , nickel diarsenide, cobalt diarsenide, nickel arsenide, cobalt arsenide sulfide, copper arsenide sulfide, and iron diarsenide.

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flotation of gold sulfide pax

Oct 18, 2018· Environmental properties of arsenic containing flotation tailings from . Apr 26, 2018 decrease As and sulphide minerals in the flotation tailings. ... the conventional flotation methods of copper sulfide ores do not apply to . Reagent grade chemicals of potassium amyl xanthate (PAX) .. reagents: chemistry, theory and practice, Volume ...

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VOLCANICASSOCIATED MASSIVE SULFIDE DEPOSITS …

Volcanicassociated massive sulfide deposits are among the most likely of all deposit types to have associated ... arsenic, bismuth, cadmium, mercury, lead, and antimony, are present in some deposits, particularly those associated ... Thermal metamorphism commonly causes sulfide ore to become much coarser grained and develop mosaic or

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Arsenic and Antimony Sulphide Minerals in Cyanidation

The effects of arsenic and antimony sulphide minerals on the extraction of gold from a synthetic ore consisting essentially of free gold and glass sand were investigated. The amount of mineral added in each test was such that the synthetic ore assayed % As or % Sb.

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Arsenic remediation by formation of arsenic sulfide ...

Arsenic (As) is a highly toxic metalloid that has been identified at high concentrations in groundwater in certain locations around the world. Concurrent microbial reduction of arsenate (As V ) and sulfate (SO 4 2 ) can result in the formation of poorly soluble arsenic sulfide minerals (ASM).

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Removal of arsenic and antimony from sulphide ores ...

BACKGROUND ART Arsenic can be one of the most toxic chemicals, yet it is relatively abundant in safe forms in sulfide ores, particularly in the Western United States, Canada, Alaska, and South Africa where the ores contain noble metals, such as gold silver, and cobalt, which are valuable precious S 1 metals.

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Sulfide Ore Treatment Gold Silver Copper Cobalt ...

A procedure was developed for recovering gold, silver, cobalt, copper, and zinc from a massive sulfide ore by a hydrometallurgical process. The procedure consists of (1) oxygen pressure leaching; (2) iron, arsenic, and copper removal from the leach solution by precipitation; (3) selective extraction of cobalt and zinc from solution; (4) electrodeposition of the cobalt and zinc from the strip ...

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REALGAR (Arsenic Sulfide) Amethyst Galleries'' Mineral ...

Realgar''s structure alternates between sulfur atoms and arsenic atoms producing rings of As 4 S 4. The arsenic atoms affect the structure altering it from sulfur''s orthorhombic symmetry to realgar''s monoclinic symmetry. Realgar occurs in hydrothermal veins with valuable metal sulfide ores and its bright red color can be an aid to prospectors.

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US3911078A Method for removing arsenic and antimony from ...

A method of treating an enargite copper ore containing arsenic and antimony to remove the arsenic and antimony therefrom. comprising the steps of a. leaching copper enargite containing chemically combined arsenic and antimony with an aqueous leach solution of sodium sulfide. present in a con centration ranging between about and 35 mo lar ...

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Realgar and Orpiment Arsenic Sulfide Minerals Geology

Orpiment is a monoclinic arsenic sulfide with a yelloworange color and a chemical composition of As 2 S 3. It has a Mohs hardness of 11/2 to 2 and is easily ground into a yellow to yelloworange powder.

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Arsenic trisulfide Wikipedia

Arsenic trisulfide is the inorganic compound with the formula As 2 S 3. It is a bright yellow solid that is insoluble in water. ... Arsenic(III) sulfide. Orpiment. Sulphuret of arsenic. ... this conversion being one of the hazards associated with the refining of heavy metal ores: 2 As 2 S 3 + 9 O 2 → As 4 O 6 + 6 SO 2. Contemporary uses.

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arsenic mineral ore

Jun 24, 2018· Arsenic Ores Article about Arsenic Ores by The Free Dictionary. Find out information about Arsenic Ores. natural mineral formations that contain arsenic in quantities sufficient to make feasible extraction of the element and its. ... Arsenic Sulfide Minerals

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Tetraarsenic tetrasulfide for the treatment of acute ...

Abstract. In the past 6 years, we treated 129 patients who had acute promyelocytic leukemia (APL) with a new arsenic agent, oral tetraarsenic tetrasulfide (As 4 S 4).Nineteen of the patients had newly diagnosed APL, 7 had first relapse, and 103 had hematologic complete remission (HCR).

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Primary Copper Smelting

Ore concentration is roasted to reduce impurities, including sulfur, antimony, arsenic, and lead. The roasted product, calcine, serves as a dried and heated charge for the smelting furnace. Smelting of roasted (calcine feed) or unroasted (green feed) ore concentrate produces matte, a molten mixture of copper sulfide (Cu2S), iron sulfide

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Realgar Wikipedia

Realgar, αAs 4 S 4, is an arsenic sulfide mineral, also known as "ruby sulphur" or "ruby of arsenic". It is a soft, sectile mineral occurring in monoclinic crystals, or in granular, compact, or powdery form, often in association with the related mineral, orpiment (As 2 S 3 ).

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Arsenopyrite an overview | ScienceDirect Topics

The toxic effects of arseniccontaining ores were recognized by observation of the workers pursuing rich veins in the bowels of the earth. The life span of early miners was very short. The ancient Greeks preferred to have slaves work the arsenicsulfide bearing formations.

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Smelting and Roasting Ores to recover gold, silver and ...

This is a concern because Arsenic is actually very common in many gold ores. Selenium, mercury and other toxic elements are also found in many high sulfide gold and silver ores as well. To roast sulfide ores, it takes a good red heat and a good amount of air, but not too hot as you don''t want to melt them.

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The Role of Arsenic in the Mining Industry

Arsenic in the mining industry . ... • Arsenic is a naturally occurring element commonly found as an impurity in metal bearing mineral ores. • Arsenic is widely distributed in rocks and soil, in natural waters, and in small amounts in most living ... • The rate of arsenic release from sulfide minerals can be accelerated by mining ...

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THE ALKALINE SULFIDE HYDROMETALLURGICAL SEPARATION ...

application to arsenic, antimony and mercury bearing ores, concentrates, byproducts, and other materials. 1. Fundamental Alkaline Sulfide Hydrometallurgy ... The rest of this paper deals with the specific leaching application of the alkaline sulfide system to arsenic, antimony, and mercury bearing materials. The equations that

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Sulfide Minerals an overview | ScienceDirect Topics

Arsenic can exist in sulfide minerals either as a dominant mineralforming element or as an impurity. Arsenic release into nature is a slow process as a result of mineral weathering; however, physical forces such as grinding, crushing, and pulverization from mining activities greatly increase the release rate.

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Arsenic | Minerals Education Coalition

Arsenic. Arsenic (As) is classed as a semimetal, or metalloid. In nature it is commonly found as a metal in low levels in most soils and in higher concentrations associated with some copper, lead and zinc ores.

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